| Prentice Northeast Unit #642-445-00348 | Highmark Energy Operating LLC | Terry, TXPrentice (6700) | ActiveInjection | 7,350 | Dec 22, 2006 | — | — |
| Cooper 358 #1HHZ42-295-33132 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Cleveland) | ActiveOil | 8,376 | Dec 21, 2006 | — | — |
| Prentice Northeast Unit #2B42-445-00112 | Highmark Energy Operating LLC | Terry, TXPrentice (6700) | ActiveInjection | 7,350 | Dec 15, 2006 | — | — |
| Prentice Northeast Unit #17 L42-445-00346 | Highmark Energy Operating LLC | Terry, TXPrentice (6700) | ActiveInjection | 7,400 | Dec 13, 2006 | — | — |
| Prentice Northeast Unit #49042-445-32166 | Highmark Energy Operating LLC | Terry, TXPrentice (6700) | Shut inOil | 7,375 | Dec 12, 2006 | — | — |
| Martin 800 #4HHZ42-295-33122 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Cleveland) | ActiveOil | 7,709 | Dec 8, 2006 | — | — |
| Prentice Northeast Unit #4842-445-00534 | Highmark Energy Operating LLC | Terry, TXPrentice (6700) | ActiveInjection | 7,400 | Dec 8, 2006 | — | — |
| Dude Wilson Gas Unit 4 #942-357-32640 | Highmark Energy Operating LLC | Ochiltree, TXDude Wilson (Morrow Middle) | ActiveGas | 9,000 | Dec 6, 2006 | — | — |
| Prentice Northeast Unit #53342-445-32163 | Highmark Energy Operating LLC | Terry, TXPrentice (6700) | Shut inOil | 7,426 | Dec 6, 2006 | — | — |
| Prentice Northeast Unit #64742-445-32159 | Highmark Energy Operating LLC | Terry, TXPrentice (6700) | Shut inOil | 7,500 | Nov 29, 2006 | — | — |
| Prentice Northeast Unit #74742-445-32160 | Highmark Energy Operating LLC | Terry, TXPrentice (6700) | Shut inOil | 7,153 | Nov 29, 2006 | — | — |
| Prentice Northeast Unit #51142-445-32157 | Highmark Energy Operating LLC | Terry, TXPrentice (6700) | ActiveOil | 7,419 | Nov 20, 2006 | — | — |
| Prentice Northeast Unit #60742-445-32158 | Highmark Energy Operating LLC | Terry, TXPrentice (6700) | PluggedOil | 7,600 | Nov 20, 2006 | — | — |
| Prentice Northeast Unit #50542-445-32152 | Highmark Energy Operating LLC | Terry, TXPrentice (6700) | ActiveOil | 7,365 | Nov 17, 2006 | — | — |
| Prentice Northeast Unit #69642-445-32151 | Highmark Energy Operating LLC | Terry, TXPrentice (6700) | PluggedOil | 7,500 | Nov 14, 2006 | — | — |
| Price Willis D. #14HHZ42-295-33116 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Cleveland) | Temporarily abandonedGas | 7,872 | Nov 9, 2006 | — | — |
| First National Trust-Courson 571 #10HHZ42-357-32635 | Highmark Energy Operating LLC | Ochiltree, TXPan Petro (Cleveland) | ActiveGas | 7,011 | Nov 3, 2006 | — | — |
| Bitler-Lowe Clearfork Unit #3242-003-39969 | Highmark Energy Operating LLC | Andrews, TXFullerton | Shut inOil | 7,260 | Oct 24, 2006 | — | — |
| Bitler-Lowe Clearfork Unit #2942-003-39970 | Highmark Energy Operating LLC | Andrews, TXFullerton | Shut inOil | 7,250 | Oct 24, 2006 | — | — |
| Lowe M. R. 15 #242-003-39971 | Highmark Energy Operating LLC | Andrews, TXFullerton | Shut inOil | 7,345 | Oct 23, 2006 | — | — |
| Bitler-Lowe -B- #1742-003-39972 | Highmark Energy Operating LLC | Andrews, TXFullerton | ActiveOil | 7,330 | Oct 23, 2006 | — | — |
| Prentice Northeast Unit #50642-445-32046 | Highmark Energy Operating LLC | Terry, TXPrentice (6700) | PluggedOil | 7,358 | Oct 20, 2006 | — | — |
| Barton 346 #1HHZ42-295-33111 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Cleveland) | Shut inOil | 8,448 | Oct 16, 2006 | — | — |
| Lowe M. R. 15 #342-003-39963 | Highmark Energy Operating LLC | Andrews, TXFullerton | Shut inOil | 7,310 | Oct 13, 2006 | — | — |
| Pearl Wheat a 765 #1HHZ42-295-33108 | Highmark Energy Operating LLC | Lipscomb, TXPeery (Cleveland) | ActiveOil | 7,331 | Oct 12, 2006 | — | — |
| Hunter 676 #2HHZ42-295-33105 | Highmark Energy Operating LLC | Lipscomb, TXPeery (Cleveland) | ActiveOil | 7,375 | Oct 6, 2006 | — | — |
| Fairway/James Lime/Unit #447342-213-30754 | Highmark Energy Operating LLC | Henderson, TXFairway (James Lime) | ActiveGas | 10,230 | Sep 22, 2006 | — | — |
| CNB G 345 #11HHZ42-295-33082 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Cleveland) | ActiveOil | 8,359 | Aug 18, 2006 | — | — |
| Miles Hayden a #7G42-003-39930 | Highmark Energy Operating LLC | Andrews, TXDeep Rock (Glorieta 5950) | ActiveOil | 6,107 | Aug 17, 2006 | — | — |
| Deep Rock Etal -a- #10G42-003-39931 | Highmark Energy Operating LLC | Andrews, TXDeep Rock (Glorieta 5950) | ActiveOil | 6,150 | Aug 17, 2006 | — | — |
| Miles Hayden a #6G42-003-39928 | Highmark Energy Operating LLC | Andrews, TXDeep Rock (Glorieta 5950) | ActiveOil | 6,102 | Aug 9, 2006 | — | — |
| Cooper 348 #2HHZ42-295-33076 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Cleveland) | ActiveOil | 8,405 | Aug 7, 2006 | — | — |
| Fairway /James Lime/ Unit #154242-213-30907 | Highmark Energy Operating LLC | Henderson, TXFairway (James Lime) | ActiveOil | 10,200 | Jul 27, 2006 | — | — |
| Fairway /James Lime/ Unit #7513HHZ42-001-32534 | Highmark Energy Operating LLC | Anderson, TXFairway (James Lime) | PluggedOil | 10,300 | Jul 24, 2006 | — | — |
| Martin 800 #3HHZ42-295-33058 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Cleveland) | ActiveOil | 7,707 | Jun 30, 2006 | — | — |
| Pearl Wheat a 765 #6HHZ42-295-33054 | Highmark Energy Operating LLC | Lipscomb, TXPeery (Cleveland) | ActiveGas | 7,334 | Jun 26, 2006 | — | — |
| Alma #542-135-02438 | Highmark Energy Operating LLC | Ector, TXGoldsmith W. (San Andres) | ActiveInjection | 9,820 | Jun 9, 2006 | — | — |
| Schultz Brothers E #7HHZ42-295-33034 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Cleveland) | ActiveGas | 7,532 | Jun 6, 2006 | — | — |
| Pshigoda-Courson 572 #3HHZ42-357-32579 | Highmark Energy Operating LLC | Ochiltree, TXPan Petro (Cleveland) | ActiveGas | 7,052 | May 31, 2006 | — | — |
| Doyle J.B. #8HZ42-295-33024 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Cleveland) | ActiveGas | 7,737 | May 22, 2006 | — | — |
| Doyle J.B. #6HHZ42-295-33023 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Cleveland) | Temporarily abandonedGas | 7,771 | May 18, 2006 | — | — |
| Mitchell 763 #6HHZ42-295-33039 | Highmark Energy Operating LLC | Lipscomb, TXPeery (Cleveland) | ActiveOil | 7,349 | May 15, 2006 | — | — |
| CNB G 345 #10HHZ42-295-33031 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Cleveland) | Shut inOil | 8,407 | May 8, 2006 | — | — |
| Parker Harry B #442-295-33029 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Atoka 9200) | ActiveGas | 9,450 | May 4, 2006 | — | — |
| Mitchell 763 #5HHZ42-295-33025 | Highmark Energy Operating LLC | Lipscomb, TXPeery (Cleveland) | ActiveOil | 7,343 | Apr 25, 2006 | — | — |
| Bitler-Lowe -B- #1242-003-39852 | Highmark Energy Operating LLC | Andrews, TXFullerton | ActiveInjection | 7,300 | Apr 24, 2006 | — | — |
| Bitler-Lowe Clearfork Unit #2142-003-39853 | Highmark Energy Operating LLC | Andrews, TXFullerton | ActiveOil | 7,317 | Apr 24, 2006 | — | — |
| Prentice Northeast Unit #27742-445-32119 | Highmark Energy Operating LLC | Terry, TXPrentice (6700) | ActiveOil | 7,368 | Apr 21, 2006 | — | — |
| Doyle J.B. #5HHZ42-295-33021 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Cleveland) | ActiveGas | 7,732 | Apr 20, 2006 | — | — |
| Prentice Northeast Unit #113B42-445-00217 | Highmark Energy Operating LLC | Terry, TXPrentice (6700) | PluggedOil | 6,500 | Apr 20, 2006 | — | — |